Detections
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1.424 RHEL-10-800230

Information

RHEL 10 must ignore IPv6 Internet Control Message Protocol (ICMP) redirect messages.

GROUP ID: V-281355
RULE ID: SV-281355r1167215

An illicit ICMP redirect message could result in a man-in-the-middle attack.

Satisfies: SRG-OS-000420-GPOS-00186, SRG-OS-000142-GPOS-00086

Solution

Configure RHEL 10 to ignore Internet Protocol version 6 (IPv6) ICMP redirect messages.

Create a configuration file if it does not already exist:

$ sudo vi /etc/sysctl.d/ipv6_accept_redirects.conf

Add the following line to the file:

net.ipv6.conf.all.accept_redirects = 0

Reload settings from all system configuration files with the following command:

$ sudo sysctl --system

See Also

https://workbench.cisecurity.org/benchmarks/26403

Item Details

Category: SYSTEM AND COMMUNICATIONS PROTECTION

References: 800-53|SC-5, 800-53|SC-7(6), CAT|II, CCI|CCI-001110, CCI|CCI-002385, Rule-ID|SV-281355r1167215_rule, STIG-ID|RHEL-10-800230, Vuln-ID|V-281355

Plugin: Unix

Control ID: 0ffe7cdd4e4eab5a33fb13aaeb6cb3a02595bfc17aec7e79e0c482425d4123d0